Improvement in sewing-machines



6 Sheets-Sheet 1. A. WARTH.

Sewing Machine.

Patented Sept. 7, 1869.

6 SheetsSheet 2.

A. WARTH.

Sewing Machine.

No. 94.677. Patented Sept. 7, 1869.

I I! I 6 Sheets-Sheet 3.

A. WARTH. Sewing Machine.

Patentd ,Sept. 7, 1869.

THE mmoNAL LWNOOHAPHING cow-Al".

6 A. WARTH' Sheets Sheet 4 Sewing Machine.- N0- 94,677.

Patented Sept. 7, 1869.

6 Sh tSh t5. A. WARTH. 6e

Sewing Machine. No. 94,677. Patented Sept. 7, 1869.

THE NATIONAL LIYNOERAFHXNG COMPANY.

WASHINGYON. u c

6 Sh t-h 6. A. WARTH. ees S eet Sewing Machine.

Patented Sept. 7, 3869.

, for making the zigzag UNITED STATES PATENT OFFICE.

ALBIN WARTH, oF STAPLETON, NEW YORK, ASSIGNOR T HIMSELF AND EBERHARDFABER, OF NEW YORK oITY.

IMPROVEMENT m SEWING-MACHINES.

Specification forming part of Letters Patent No. 94,677, dated September7, 1669.

To all whom it may concern:

Be it known that I, ALBIN WARTH, of Stapleton, in the county ofRichmond, State of New York, have invented a new and useful Improvementin Sewing-Machines; and I do hereby declare the following to be a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanying drawing forming part of this specification, in whichdrawing- Figure 1 represents a longitudinal vertical sectionof thisinvention. Fig. 2 is an inverted plan of the same. Fig. 3 is atransverse section of the same. Fig. 4 is a sectional side elevation ofthe embroidery attachment. Fig. 5 is a plan or top View thereof. Fig. 6is a horizontal section of the same. Fig. 7 is a sectional sideelevation of the pattern-wheel attachment, by the 'aid'of which variousdifferent stitches and ornamented seams are produced. Fig. 8' is a topviewthereof. Fig. 9 'is a horizontal section of the same. Fig. 10 isalongitudinal section of the parts the connection between thepattern-wheel attachment and the throat-plate. Fig. 11 is a plan ortopview of the same. Fig. 12 is a transverse section of the same. Fig.13 is a plan or top view of the central edge-gage used in joining twopieces of material at their ends or edges. Fig. 14 is a modificationthereof. Fig. 15 is a similar view of the attachment overhand-stitch.Fig. l6-is a front view, and Fig. 17 a transverse section, of the springprcsser-foot. Figs. 18, 19, and 20 are front views of the cams anddiagrams of the stitches produced thereby. Fig. 21 is a face view of theshuttle-race. Fig. 22 is a rear view of the shuttle-driver. Fig. 23. isa plan of the shuttle. Fig. 24 is a trans verse section of the same.

Similar letters indicate corresponding parts.

This invention consists in the arrangement of a raised eye and a raisedrim on the back ofthe shuttle in such a manner that the shuttle-threadon passing out of this eye is held inconvenient position to be caughtby'the cast-oft hooks.

Also, in the arrangement of shoulders projecting from the shuttle on alevel with the spool, and forming the bearings for the shuttle-driver,and serving to carry the shuttle round in its circular race in such amanner that the equilibrium of the shuttle as the forming Further, inthe arrangement of one or more segmental rims on the back of theshuttle, projecting into a circular groove in the vertical shuttle-racein such a manner that the shuttledriver is relieved from the weight ofthe shuttie, and the loop of the needle-thread can pass freely throughbetween the shuttle and the shuttle-driver, and at the same time thehearing of the shuttle in its race can be brought as close as desirableto the center of motion, and the friction of the shuttle. in its race isthereby reduced.

Also, in a sewing mechanism composed of an eye-pointed needle receivingits motion by a smooth eccentric, and of a shuttle which travels in acircular race, when the two are so combined that each stitch is finishedbefore the next stitch is commenced.

Further, in the arrangement of shoulders on the circular rim of theshuttle-race on the sides of the needle-channel, in combination withashuttle traveling in 'a circular race, and provided with depressions inits rim in such a manner that-the shuttle, in'passing through the loopof the needle-thread, will be prevented from producing a rolling motionof said thread, and from carrying the same be tween the back of theshuttle and the shuttlerace.

Also, in the arrangement ot'an annular depression in the shuttle-race totake in the points of the noses ofthe shuttle-race, whereby said nosesare enabled to catch hold ofthe shuttle-thread and impart to it therequisite tension for finishing the stitch before the shuttle arrives inthe position opposite the needle.

Further, in the arrangement of cast-0d hooks projecting from theshuttle-race, and serving to disengage the shuttle-thread from the-nosesof the shuttledriver at the proper lDOlIlGllt.

Also, in the arrangement of a radial depression in the shuttle-race insuch a manner that the shuttle-thread is free to move sidewise out ofthe way of the descending needle.

Also, in the arrangement of a double cam on the shuttle-driver, actingon the feed mechanism in such a manner that the requisite feed-motion isproduced in whatever direction the shuttle-driver moves.

Further, in the arrangement of self-adjusting cams or eccentrics, incombination with the reciprocating needle, the-oscil'latinglcver risingand falling throat-plate, and shuttle.

traveling in a circular race, in such a manner that the motion of theneedle and the rising hub projecting from the cam, which operates thetake-up, in combination with a stud or catch secured to the slottedhuboftheeccentrio, in such a manner that said cam is capable ofadjusting itself in either: direction. to:

correspond to the position of the eccentric.

Also, in the arrangement of a=brake,.in com= bination withthe looseself-adjusting camfand spring actuating the take-up, in.such, a manncrthat said cam is prevented fro mbeing changed initsposition by.theaction of thespring,

' Further, in the arrangement of a cam-wheel,

' in combination with the presser-foot and-clothplate, in such=a mannerthat a. reciprocating: motion is imparted to the workv andvariousdifl'erent stitches canbe produced.

.Further, in the arrangement of a swivel-- plate under the presser-foot,in. combination.

with the guide-rod, in such a manner that said swivel-plate is keptparallel by the guide-rod.-

while the presser-foot oscillates, and, thereby therequiredzigzag motionis imparted tothe.

work without an additional oscillating motion.

Also, in connecting the throat=plate with theprcsser-foot, whichreceives an oscillatingmotion by a cam of suitable shapein such a man-.

her that, by the action of. said. cam on the. presser-foot, thethroatrplate, and consequently'.the work placedon.it,.receives-a-reciprocatin'g motion ina direction. transversely tothe feed-motion, and thereby seams and stitchesof various descriptioncan be produced. Further, in the arrangement of-a flange. projectingdownward from the-throat-plate, and engaging with the feed-dog in such amanner that said feed-dog is compelled to participate in thereoiprocatiugmotion of. the throatplate, and thereby the correct motionof the. work is better secured, 7

Also, in the arrangement. of a lip projectingv upward from the movablethroat-plate, and acting as a central edge-gage for two pieces ofleather or other material to be sewed togetheredge to edge in such amanner that, by. said lip and movable throat-plate, azigzag motion isimparted to the two pieces of materiahand the needle is caused to passfirst through one and then through the other piece, and a zigzagedge-scam is produced, whereby the two pieces of material arefirmlyunited edge to ed e.

laurther, in the arrangement of a guidingscrew projectingfrom or screwedin the presserfoot, in combination with the oentraledge-gage, in such amanner that. said edge-gage is compelled to move with-the presser-foot,and that its position can be regulated to conform to the desired courseat the seam.

Al so, in the-arrangement of a=hinged springlevor provided with aset-screw which bears against a stationary lip, and with a projectionwhich acts onthe cam-wheel, in combination with the rod which transmitsthe motion pro"- duced by the cam-wheel to the presser-footin such amanner-that the amount of motion to .be transmitted. from the cam-wheelto the presser-ibot can be increased or diminished accordin'ggto thenature of the stitchto be produced;

Also, in the arrangement of a center point, in combination with areciprocating throatplate and camg-wheehin such amanncr that thepattern; controlledby the cam-wheel can be sewed in a circle.

Also, in the arrangement of an embroidery attachment actuated by a camwheel, which.

receives its motion from the needle-bar'or needle-lever in suchal-manner that said e'mbroidery attachment can. be readily attached tothe sewing-machineon removed therefrom,

and that it does not interfere withthe use of the sewing-machine forordinary purposes The letter Arepresents the; table or clothplate,from.-one.end of whichrises the gooseneck B, the end of which is.formedinto socketsto receivethe-guide-rods- 0 D, on one of which slides thetubular supportingbar E of the .presser-foot F,.while the other forms'the guide for the tubular needle-rod. Gr, as shown more=particularly inFigs, 4 and 7 of the draw ing. The needle-rod G- is closed at its bottomend, audit-terminates in a flat shank, a, which fits-loosely .ntoacage,b,-.whichv is provided:

with a clamping-screw, 0, (see Fig. 1,) so that, by slipping the flatshank of the needle it into the cage b and turning the screw 0, saidneedle can be firmly clamped to the end of the needle bar, andhyunscrewing. said screw the needle. can be'removed, and is held firmlyinpositionagainst lateral asiwellas against an up-and- .downpressure.The supporting-bar E of the pressecfoot F is also closed at its bottomend,

and it is providediwitha curved neck,- 01, (best seen in Fig. 1,) towhich the presser-foot is attached by a set-screworclamping-screw, a. Bymeans of this neck the presser-foot is brought in such a positionthat.room is left for the introduction ofone or more fingers of the handunder. the supporting-bar of the-- presser-foot,c and thereby themanipulation of the work during the process-of sewing is ma;

terially facilitated. The shuttle S, which is usedin this machine, iscrescent-shaped, as

sh own in Figs. 3 and 23. It'is provided with an eye, f, in the center,between its two points or horns, and this eye projects'above the back ofthe shuttle, (see Fig. 24,) so that the shuttle-thread, in passing fromthis. eye to the .throatplato, does not bear closely against the.

back of the shuttle, but a space is left to allow the cast-ofl' hooks-tocatch the thread, as will ,be presently explained. The shuttle isprovided; with a raised rim. .0, on its back, to

engage with a groove, h, (see Fig. 1-,) of the shuttle-race B, so thatthe weight of the shuttle, while said shuttle passes through the upperhalf of its race, does not bear down upon the shuttle-driver, andthereby the operation of driving the shuttle is facilitated, and theneedle-thread is allowed to pass freely through between the noses of theshuttle-driver and the shuttle. From the back of the shuttle projectsalso an additional segmental lip,.t', (see Figs. 1 and 3,) which engageswith a groove, j, (see Fig. 1,) in the shuttle-race, so that theshuttle, while traveling round in its race, does not bear against thecircumferential rim or flange of the race, but is supported by the lip iata point as close as possible'to the center of the race, and therebytherfriction created by said shuttleaud the power'required forpropelling the same in its rate are reduced.

In the rim 9 are two depressions, k is, (see Fig. 3,) near 'the'pointsof the shuttle, and at such points and in such position thatthe'shuttle, while passing. through" the loop of the needle-thread,will-not produce any injurious friction onthe shuttle-thread, for justafter the point of the shuttle has caught the loop motion, and, as, soonas said thread strikes the shoulder I, it is prevented from beingcarried any farther by the shuttle, and consequently no rollin g motioncan be imparted to it. The shuttle-driver H is provided with twoprojections, m m, (see Fig. 3,) which bear on shoulders 0 0 of theshuttle, (see Fig. 23,) and these shoulders are on a level with-themiddle line of the height of the spool,so that theysupport the shuttleas near as possible in equilibrium, and that the action of theshuttle-driver will produce no tendency to, force the shuttle backagainst the shuttle-race, whereby an un-.

necessary friction would be produced. From the shuttle-driver projectalso two noses, pp, and the points of these noses project into thecircular-groove) in the shuttle-race, and they serve to impart to theshuttle-thread the re-' quired tension for finishing the stitch beforethe shuttle has reached the position opposite the needle, and before theneedle has again descended far enough to pass into the work, the actionof said noses on the shuttle-thread taking place just before theneedle-thread is drawn up by the "take-up, each stitch being finishedbefore the next stitch is commenccd.v

By this arrangement the use of 'a smooth eccentric for imparting motionto the needle is rendered fcasible;.otherwise themotionsof the needleand double-pointed shuttle could not be made to harmonize, except bymeans of cams in the usual'manuer. After the shuttle-thread has beencarried far enough by the noses it is throwuofl' therefrom by thecastofi' hooks r 7', which project from the shuttlerace, (see Figs. 1and 21,) and it is then caught by the elastic center .9 being extendedbetween the workand said elastic center, and situated in the depression,t in the shuttle-race, which is suiliciently wideto allow thefeed-motion to move the shuttle-thread far enough to one side of theneedle-path to be out of the way of the descending needle. The radial.depressiont in the shuttle-race is seen in Fig. 21, and the elasticcenter in Figs. 1 and 3. This elasticcenter consists in a center-pininserted loosely into a socket in the center of the shuttledriver, andprovided with a loose head, which is forced out against the shuttle-raceby themaction of a spring bearing on the inner end of the center piu,(see Fig.1,)-

so that saidhead adapts itself readily to the face of theshuttle-race,--and remains stationary-while the shuttle-driver revolves.V Said elastic center serves to retain the shut- To prevent theshuttle-thread from catching behind the movable head of the elasticcenter said head is surrounded by a protector, u, the edge of which ischamfered oft, I

so. that the shuttle-thread, oncoming in contact with said protector,glides oif and passes in between the head of the elastic center and theshuttle-race.

The shuttle-driver is provided with a hinged door, '0, which islocked bya spring-catch, w. (Bestseeu in Fig.22.) By pressing back thisspring-catch this door is released, so that it can be turned back, andthe shuttle can be introduced orr'emoved without difiiculty.

The shuttle-driver is mounted on the end of the main shaft Land its hubis tapering, and forms a double-acting cam, .10, (see Fig. 22.) whichserves to actuate the feed-motion in whatever direction. the main shaftmay be turned.

The work while being sewed is supported .by the throat-plate y, whichrests on theend of a lever, 2, (see Figs. 1, 2, and 3,) to which anoscillating motion is imparted by the ac;

tion of a cam, (I), mounted on the main shaft."

By these means a rising and falling motion is imparted to thethroat-plate, and the work is to the lever z the required motion, ismounted loosely on the shaft I, and His provided with a projection, b,to receive astop, 0 which is secured in the shaft, so that the cam isal. lowed to turn on the shaft until one or the other of the ends of theprojection b is struckv by the stop 0 By this arrangement the cam isrendered self-adjusting, so that the throatplate is raised and loweredat the vproper intervals in whatever direction the main shaft I isturned. The cam a acts on a shoe or block, (1 which is attached to theunder surface of the lever z opposite the cam a, and this block is soarranged that it can be readily shifted, so that if it is worn out inone place a fresh surface can be brought opposite the cam and thecorrect position of the throatplate is not interfered with.

The feed-dog e is attached to a lever or arm, f which oscillates on apin, 9 and to which the required oscillating motion is imparted by thecombined action of a spring, h, (see "Fig. 2,) and of a tappet-arm, t'(See Fig. 2.) This tappet-arm is mounted on the end of a rod, j, thathas its hearings in lugs or brackets projecting from the under surfaceof the cloth'plate A, being so arranged that it is parallel to the mainshaft, and that it can be moved in its hearings in' the directionparallel to the main shaft by means of a button,

M, which projects above the cloth-plate, and serves to regulate thelength of the stitches,

-' as will be. presently explained.

One end of the tappet-arm i straddles a pin projecting from the leverj", which supports the feed-dog, and its other end bears against the cama: formed by the hub of the shuttledriver, and as the shuttle-driverrevolves said cam imparts an oscillating motion to the tappetarm i andthrough it to the lever f which carries the feed-dog. The amount ofmotion imparted to the feed-dog depends upon. the

position of the tappet-arm i in relation to the cam-m If said tappet-armstands opposite the thick part of the cam the feed-motion is large andthe stitches produced are long, butif the tappet-arm is moved toward thethin end of the cam the feed-motion is decreased and thelength of thestitches diminished. The pin g which forms the bearing for-the feed-doglever f also supports the shuttlerace, and it is situated in line withthe main shaft I, so that the holes, which form thebearings for saidshaft and for the pin, can be bored out at one operation and withoutchanging the position of the cloth-plate in relation to the drill, andthereby the construction of the machine and the adjustment of thevarious parts in relation to each other are materially facilitated. Themotion of the needle-bar isprod'ueed by the action of a plain eccentric,l, which is mounted on the main shaft 1, and connects 'by a rod, m andlever, n, with the needle-bar. The use of this plain eccentric.

said eccentric is allowed to turn on its shaft as far as the slot 11 andstop will permit, and it is enabled to adjust itself automatically onthe shaft according to the direction in which said shaft is turned. 0nthe hub of the eccentric Z is mounted the cam T which controls themotion of the take-up 8 This cam is'als'o provided with a slotted hub, aand a stop, t, secured to the hub of the eccentric l,

engages with the slot in the hub a and allows said cam to adjust itselfautomatically, according to the direction in which the main shaft isturned. The cam 1' acts within the opening formed by arm '0, (see Fig.1,) which is held in contact with said cam by a spring, to, and whichconnects with the take-up s by means of a rod, as. To prevent said camfrom being turned spontaneously by the action of the spring 10 a brake,3 is applied, which produces sufficient friction to retain said camagainst the action of its spring, but allows it to adjust itself freelyaccording to the direction in which the main shaft revolves. I

The take up consists of an elbow-lever, and the rod :10 passes looselythrough its horizontal'arm, said rod being provided with a head or stop,so that it acts-on the take-up in going down, but does notimpart to thesame any motion in going up. A finger,.z which is attached to the rodconnecting the eccentric l with the needle-lever, serves to restore thetake-up to the position which the same occupies in Fig. 1, and by thesemeans a positive motion is imparted to said take-up in either direction,and its operation is not made dependent on the action of springs, which.sub ject the thread to an unnecessary tension. The finger z isadjustable on the eccentric rod, so thatit can be made to act on thetakeup at the proper moment.

' I will now proceed to describe the various attachments for producingseams and stitches of different kinds. For this purpose I use cam-wheelsof various forms, such, for .instance, as shown in Figs. 4, 7, 18, 19,and 20. The cam-wheel K, Fig. 4, serves to produce theembroidery-stitch. It is mounted on .a shaft, a which has its bearingsin a bracket, b, that is secured to the end of the goose-neck B by .ascrew, 0 An intermittent revolving motion is imparted to said cam-wheelby means of a pawl, d which is mounted on the upper end of a rod, 6 thatextends down into a hollow needle-rod, G, as shown in Fig. 4, beingsubjected to the action of a spring, f, which keeps its bottom end incontact with the bottom of the hollow nee le-rod. l Said pawl acts onratchet-teeth 9 on into the circumference wheel' an intermittent rotarymotion. Instead of operating the rod 6 from the needle-bar, it may beoperated from the needle-lever, as indicated in Fig. 1, by' means of arod, e

On the sides of the 'cam-wheel are two rods,

if, the upper ends of which are bent, as shown in Figs. and 5, and heldin contact with the sides of the cam-wheel by springs '5 These rods havetheir hearings in lugs f secured to the bracket 2 and their lower endsare bent in oblique directions toward the needle, and they are providedwith eyes 70 (see Fig. 4,) to receive the einbroidering-threads, whichare taken from spools Z mounted on pins, which rise from the bracket12*. On the sides of the cam-wheel K are four, more or less, projectionsorcams, which act on the rods W, and impart to the same an oscillatingmotion, whereby their lower oblique ends are caused to assume avibrating motion, and the threads passing through the eye k are braidedtogether in front of the needle n. By these means an embroidery-stitchis produced, as shown in Fig. 6, which is sewed down upon the work bythe action of the ordinary sewing mechanism;

If the embroidery attachmentis not required thescrew c is unscrewed, andthe whole attach ment can be taken off, leaving the sewing mechanismundisturbed.

In Figs.' 7 to 15, inclusive, I have shown my cam-wheel attachment forproducing various fancy stitches, and also what I term azigzag-edge-seam, an overh-and-stitch, and a semi-overhand stitch.Thisattachment consists of a cam-wheel, L, which is mounted on a pin, 1that has its hearings in a bracket, m which is secured to the end of thegoose neck 3 by a screw, it. The cam-wheel is provided withratchet-teeth c on itscircumference, and a pawl, p engages with theseratchet-teeth, and imparts to the cam-wheel the desired intermittentrotary motion. The pawl p is hinged to the upper end of a rod, whichextends down through the hollow guide rod D and tubular needle-rod G,and bears on the bottom of said needlerod, being depressed by the actionof a spring, 1". The amount of motion imparted bythe pawl p to thecam-wheel can be regulated by a slide, r, secured to the bracket m andso arranged that it allows the pawl to engage with the ratchet-teetheither throughout the entire stroke of the needle-bar, or throughout aportion of said stroke only, ac-

cording to the position which may be given to said slide. The rod g mayalso be operated by the needle-lever, instead of by the needleslide, bycausing said rod to bear on the end of the'needle-lever, similar to rode shown in Fig. 1. The pawl may, however, be turned back and thrownenti'relyout of gear with the canrwheel, if it is desired to stop themotion of said cam-wheel. The cam-wheel is providedon one side withprojections or cams's of various forms, such, for instance, as shown inFigs. 18, 19, and 20, and these cams act on a lever, t which is securedto the end of a rod, if, that extends down through the guiderod (3 andinto the tubular bar E, to which the presser-foot is attached, thebottom end of the rod it being made square to fit into a squaresocket'in the presserfoot bar, so that an oscillating motion imparted tosaid rod will be transmitted to the presser-f'oot. The lever t is drawnup toward the camss by a spring, '0 and it is provided with a hinged.tappet-arm, w the end of which bears against the cams. This tappet-armis adjusted by aset-screw, a, so that the amount of motion imparted tothe rod a by the cams s can be increased and diminished at pleasure.

. The presscr-foot which I use in this case is made in two parts, (seeFigs. 10 to 15,) viz., the part 3 which is attached to the bar E, andthe part 2' which is hinged to the'part y bye pivota (Bestseen in Fig.12.) The part c is provided Witlleit horizontal tubular socket, D toreceive the endof a, rod, 0 the upper end of which is bent and flattenedand made to catch in a guide, d (see Fig. 7,) attached to the bracket mBy this arrangement the part 2 of the presser-foot which bears directlyon the work is held in a horizontal position, and receives areciprocating motion, while the part 3 of said presser foot oscillateswith the presser-foot bar E. t

The work to be sewed is placed under the presser-plate z and ontheadditional throatplate that is provided with a downwardlyprojecting lip,j, which catches into a recess, 9 on thefeed-dog e, (Best seen inFigs. 1and 10.) From the additional throat-plate 0 extends a rod, h back to aguide-plate, i which is held loosely down upon the main clothplate A byasetscrew, 7' and from this guideplate rises a standard, F, thatconnects by a tubular rod, 1 with the pivot a of the presser-plate 2 Bythis arrangement the reciproeating motion of the prcsser-plate istransmitted to the additional cloth-plate and to the work held betweensaid presserplate and clothplate, and if the set-screw which holds thefeed-dog 0 down upon the lever f, Fig. 1, is loosened, said. feed-dogparticipates in the reciprocating motion 'of the additional clothplate.By the combination or the feed-motion and of the cam-motion, therefore,a zigzag motion is imparted to the work under the necdlen, and seams orstitches can be produced of various form-such, for instance, as shown inFigs. 18, 19, and 20-and it is obvious that by changing the forms of thecams the stitches can be varied toany desired extent:

By attaching a center-point, m (see Fig. 10,) to the rod h, whichconnects the additional cloth-plate with the guide-plate. i the fancystitches can be sewed in a circle, and in this case I'use a feed-dogwith a single tooth or point, so that the work can turn round witlioutwrinkling. I

For the purpose of making what I term the semi-overhand stitch; r, inother words, for

sewing one piece of material on another by a zigzag stitch ,passingalternately down through both pieces of material, and then only throughthe lower piece, I attach to the rod P an adjustable edgegage, n, whichforms a guide for the upper piece of material, as shown in Fig, 15. Forthe purpose of making what 1 term a zigzag edge-seam, whichserves to sewtwo pieces of material together, edge to edge, as shown in Fig. 13, Isubstitute for the additional throat-plate a another throat-plate, 0(see Fig. 13,).which is also provided with. a downwardly-projecting lipto engage with the feed-dog,but which is connected to thepresserplate a?by means of a set-screw, (1 provided with a jam-nut, p and so arrangedthat it can be introduced in a slot in the lip r which rises from theupper surface of the throat-platen This lip also serves as the gage forguiding the two pieces of material to be united, one piece being made tobear against one, and the other piece against the other side of saidgage,and by means of the set-screw y this gage can be so adjusted thatthe joint of the two pieces to be united is just under the point of theneedle. The throat-plate 0 instead of being guided by the guide-plate iis simply guided by a pin projecting downward into a slot in the maincloth-plate, as shown in-dotted lines in Fig. 13., By changing theform'of the cams this zigzag edge-stitch can'be so modified that theneedle passes dewn first through one of the pieces to be joined, thenthrough the joint, and then through the other piece. This doubleedge-gage r and the throat-plate 0 may also be attached to thepresser-foot F in the manner shown in Fig. 14, the presser-foot itselfbeing provided with two set-screws, which serve to set the edge. gage.This throais-plate o may'also be used 7 for sewing an ordinaryoverhand-seam.

In some cases I find it of advantage to use a spring presser-foot, B,such as shown in Figs. 16 and 17. This foot is provided with a spring, 5which exerts a slight pressure on the work when the throat-platedescends or 'the presser-foot rises, so that the work cannot bedisplaced by accident.

Having thus described my invention, what I claim as new, and desire tosecure byLetters Patent, is

1. The raised eye f on the shuttle S,'in combination with the raised rim9, so as to bring the shuttle-thread in the proper position'for thecast-oil hooks r r, substantially as shownand described.

2. The shoulders 0 on the shuttle, being sit-' uated on a level with themiddle line of theheight of the spool, secured in the shuttlesubstantially as described. I

3. The projecting rims g and 'i on the back of the shuttle, in'combination with a circular groove in the vertical shuttle-race, andwith the nosesof the shuttle-driver serving to su'p-' port the weight ofthe shuttle, so as to allow the needle-thread to pass freely throughbetween the shuttle and the noses of the shuttledriver, substantially assetforth.

4. A sewing mechanism composed of an eye-pointed needle, receiving itsmotion from tially as described, to operate together in the manner setforth.

5. The shoulders ll on the circular rim in the shuttle-race R,"incombination with 'a sh uttle traveling in a circular race, and providedwith depressions Ia in-its rim, substantially as set forth.

6. The annular depression j in the shuttlerace R, in combinationwithhooks p p of the shuttledriver, as described-.-.

7. The cast-01f hooks r r in the shuttle-race, in combination with thenoses p p of the shut tie-driver, substantially as set forth.

8. 'The radial depression t in the circular shnttlerace R, substantiallyas described.

9. The double cam 02 w on the shuttle-driver, in combination with thefeed mechanism, sub-,

stantially as set forth.

10. The self-adjusting cameo and a in combination with the reciprocatingneedle n,

'thelever z, rising and falling throat-plate y,

and with the double-pointed shuttle moving in a circular race ineitherdirection, substantially as set forth. I

11. The slotted hub of the. cam u which actuates the take-up, incombination with the stop t on the slotted hub 0 of the eccentric l andwith the stop q, substantially as described.

12. The brakey in combination with-the slotted hub of the cam u, andwith the spring combination with the feed-dog e substantial- 1y as setforth.

17. The double edge-gage r on the throatplate 0, in combination with theoscillating presser-foot y z, substantially as described. 18. Theguiding-screw. q, secured in the presser-foot, in combination withthelip r of the throat-plate 0 substantially as set forth.

19. ,The arrangement of the hinged springlever t, provided with aset-screw, and with a projection which acts on the cam-wheel L, in

combination with the rod u and presser-foot" E, substantially asdescribed.

20. Thecenter-point m, in combination with the additional throat-plate0" and oscillating' resser-foot g z, substantially as set forth.

21. The embroidery attachment, consistingof a cam-wheel, K, operated byapawl from the needle-barfor' needle-lever, and actuating the 'rods'khaving oblique thread-guidesk, all constructed substantially asset-tbrth.

22. The adjustable edge-gage n, in combt nation with the additionalplate 0 and movable,presser-foot' z z, substantially as described.

Witnesses: -ALBIN WAR-TH.

-W. HAUFF,.

' ERNEST E. KASTENHUBER-

